Gotta figure out why it's a hermie.. interrupted light cycle, stress, genetics? If your lower buds have many nanners she/he's gotta go. I have picked off singular nanners and finished the cycle until finished and the product seemed fine with 5-10 seeds in those lower buds. But the room needs to be well cleaned so no pollen is left behind to seed your next set of girls. Sorry to hear but at least you caught it quick. The male organs can develop and release pollen within 24 hrs. so keep checkn her daily. Make sure it is total darkness in the dark cycle. No light, Zero.
Just another day in the jungle.